Alright, this is a little weird, but upon investigating things further, I found out something interesting. It seems that at some point after releasing the GP32, "Gamepark" split up into two companies: "Gamepark" and "Gamepark Holdings". "Gamepark Holdings" is the company that is designing the GPX2, whereas "Gamepark" is doing it's own thing and designing a seperate handheld called the XGP (eXtreme Game Player)!
If you visit Gamepark's Website, you'll get a popup window with the specs for the XGP, written mostly in Japanese, but enough to make sense: It's based on an ARM920T running at 200MHz, it has some form of hardware 3D acceleration (The GPX2 has no 3D acceleration), a 4" 480x272 TFT LCD screen (like the PSP I guess), 64MB RAM & 64MB Flash memory, WiFi, SD-card slot, TV-Out and USB connectivity as well as MP3/MPEG4 playback. They don't show any pictures of the system or anything like that.
I've heard from a source (who's reliability I can't ensure) that there are currently no plans to make the XGP open source in any way, which can't be good for the emulation scene. It seems very odd to me that the two companies would do this, and could make for a rather messy situation assuming both machines come to market.